.container {
  background: linear-gradient(rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.2)),
    url(https://img1.baidu.com/it/u=2622872571,2761751725&fm=253&fmt=auto&app=138&f=JPEG?w=281&h=500);
  background-repeat: no-repeat;
  background-size: 100% 100%;

  .login-btn {
    button {
      background-color: #1cccdf;
      color: #ffffff;
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 80%;
      height: 75rpx;
      font-size: 30rpx;
      line-height: 75rpx;
    }
  }
}